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Ultra-Compact 5L ITX Case | Walnut Handle + PCIe 4.0 Riser Included | 1.5mm Steel | USB3.2/Type-C | Supports 185mm GPU | Fits ITX Motherboard/FLEX-1U PSU | for Gaming/HTPC Builds(K39BLK&SG43)
SGPC

Ultra-Compact 5L ITX Case | Walnut Handle + PCIe 4.0 Riser Included | 1.5mm Steel | USB3.2/Type-C | Supports 185mm GPU | Fits ITX Motherboard/FLEX-1U PSU | for Gaming/HTPC Builds(K39BLK&SG43)

4.2(81 reviews, all variants)
entry plus$100-$149
#414 in Computer Cases
Model
K29LiteK39K39BLKK39BLK&SG01K39BLK&SG43K39 BlackK39 Black&PCIE 3.0K39 Black&PCIE 4.0v3
fan size
5mm

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AI Verdict

This 5L ITX case with 1.5mm steel construction and a 185mm GPU limit is for builders prioritizing extreme portability over ease of assembly.

Situational Fit

This case is a situational fit for builders who absolutely need a 5L chassis and are prepared for the compromises that come with such a small form factor. Its 7.7x4.7x8.7 inch dimensions and 3.3 lb weight make it highly portable, but the tight internal space and reported issues with the PCIe riser and documentation mean it's not a straightforward build.

If extreme portability isn't the absolute top priority, look for ITX cases in the 7-10L range that offer better cooling, easier cable management, and broader component compatibility.

Regret Score™

High Risk

Lower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity

50/100
vs. 1,285 Power & Cooling we've analyzedSafer than 5%
Hidden Defects
20/35

Issues discovered after purchase

Achilles' Heel
7/25

Critically weak dimension

Expectation Gap
14/20

Amazon rating vs actual quality

Fit Risk
9/20

Chance this product isn't for you

BuyChoice Score
2.2

Pros

  • Measures 7.7x4.7x8.7 inches and weighs 3.3 lbs, fitting into backpacks for portable setups.
  • Constructed from 1.5mm steel, offering a sturdy frame.
  • Includes a PCIe 4.0 riser cable for GPU installation.
  • Features front USB3.2 and Type-C ports for modern connectivity.
  • Supports 2x 2.5" SSD/HDD bays with anti-vibration mounts for expandable storage.
  • Designed for natural convection cooling, eliminating the need for additional case fans.

Cons

  • The included PCIe riser cable, despite being advertised as 4.0, has been reported by users to be stable only at PCIe Gen3.
  • Assembly can be challenging due to the extremely tight internal layout and difficult cable management.
  • Documentation is described by users as atrocious and primarily in Chinese, despite claims of an English manual.
  • Side panels may exhibit bowing or slight warping, indicating less precise manufacturing compared to higher-end SFF cases.
  • The power button is located at the back of the case, which can be inconvenient for accessibility.

Dimension Scores

Efficiency & Output5/10

The case relies on natural convection cooling, which can be sufficient for low-TDP components, but temperatures can reach 75C for GPUs and 67C for CPUs under load.

Noise Level4/10

While the case itself is fanless, the PSU and CPU cooler fans can become quite audible under load, with PSU fans being particularly loud.

Build Quality6/10

Constructed from 1.5mm steel, the case feels sturdy, but some users report bowing or warping of the side panels, indicating minor manufacturing inconsistencies.

Cable Management3/10

Cable management is notoriously difficult due to the extremely compact interior and limited routing options, described as 'snug as heck'.

Best For

  • Portable gaming rigs for LAN parties or travel.
  • HTPC builds where minimal footprint is essential.
  • Space-constrained office setups requiring a full desktop experience.
  • Enthusiasts building an ultra-compact system with specific low-profile components.

Not Recommended For

  • First-time PC builders due to complex assembly and cable routing.
  • Users requiring extensive cooling for high-TDP components.
  • Anyone needing to frequently access internal components.

Watch Out For

  • The included PCIe riser cable, while advertised as PCIe 4.0, has been reported by users to only be stable when configured for PCIe Gen3 in the BIOS.
  • The instruction manual is often in Chinese and described as 'atrocious', making initial assembly difficult for non-Chinese speakers.
  • Cable management is a significant challenge due to the chassis being 'snug as heck' with few cutouts, requiring careful planning.
  • Side panels may not sit perfectly flush, with some users reporting bowing or slight warping.
  • The maximum GPU length of 185mm is very restrictive; even 182mm GPUs can be a tight fit, especially with power connectors.

Full Specifications

ASINB0G5YJ7LYT
BrandSGPC
Case TypeSlim-Desktop
Item Weight4.5 pounds
ManufacturerSGPC
Item model numberK39 Black&PCIE 4.0v3
Product Dimensions7.68 x 4.72 x 8.67 inches
Item Dimensions LxWxH7.68 x 4.72 x 8.67 inches

What Buyers Say

The biggest surprise with this case is how much of a puzzle building in it can be, despite its compact size being a major draw. Users frequently mention the struggle with cable management and the tight clearances for components. The included PCIe riser, while advertised as Gen4, often only works reliably at Gen3, which is a significant downgrade for some builds.

“Man, this thing is tiny, which is cool, but getting everything to fit without bending wires or having the side panel bulge out was a real fight. And that riser cable? Had to mess with BIOS for Gen3, kinda defeats the point of a new GPU.”

Common Praise

  • The case is exceptionally small and portable, fitting easily into bags.
  • The 1.5mm steel construction provides a feeling of durability.
  • It can house surprisingly capable gaming hardware for its size.
  • The inclusion of USB3.2 and Type-C front ports is convenient.

Common Complaints

  • The PCIe 4.0 riser cable often defaults to or is only stable at PCIe Gen3.
  • Cable management is a nightmare, requiring significant effort and planning.
  • The documentation is poor, often in Chinese, and unhelpful for assembly.
  • Side panels can bow or warp, affecting the overall aesthetic and fit.
  • PSU and CPU cooler fan noise can be distracting under load.

Ownership Tips

  • You'll likely spend more time on cable routing than on installing major components.
  • Expect to manually set your PCIe slot to Gen3 in the BIOS to avoid stability issues with the included riser.
  • Low-profile CPU coolers are a must, and even then, thermal performance can be a tightrope walk under heavy loads.
  • Consider a modular FLEX-1U PSU to reduce cable bulk, even if it costs more.
  • The power button's rear placement takes some getting used to.

Frequently Asked Questions

What GPU length does this case support?

The case supports GPUs up to 185mm in length and 43mm in thickness.

What type of power supply does this case use?

It is designed for FLEX-1U PSUs.

Does the case come with an English instruction manual?

While the product description mentions an English manual, users have reported receiving manuals that are atrocious and in Chinese.

Is the included PCIe riser cable truly PCIe 4.0?

The product claims PCIe 4.0, but user experiences indicate the included riser may only be stable at PCIe Gen3 speeds.

How many storage drives can I install?

The case has bays for two 2.5" SSD/HDD drives.

Buying Guide

When you're looking at a case this small, you're trading convenience for compactness. Every millimeter matters, so don't just look at the big components; check cooler height, GPU length, and even PSU cable routing space. You'll need to be patient and probably do some pre-planning with your component choices to make sure everything actually fits and breathes. It's not like building in a big tower where you have room to spare.

Volume (5L)

GPU Length (185mm)

FLEX-1U PSU

PCIe 4.0 Riser Included

Alternatives

If you need more GPU options or better cooling without a huge jump in size, look for ITX cases supporting GPUs up to 250mm and SFX PSUs, typically in the 7-12 liter range.

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